Filter cartridge



FIG. 1 shows a front perspective view of the filter cartridge.

FIG. 2 shows a back perspective view thereof.

FIG. 3 shows a front view thereof.

FIG. 4 shows a side view thereof.

FIG. 5 shows a top view thereof; and,

FIG. 6 shows a bottom view thereof. 

The ornamental design for “filter cartridge,” as shown and described. 